If you're in UNIX and happen to have a source file originally created in DOS/Windows, then you most definitely have to get rid of the extra \r (a.k.a. ^M) that DOS\Windows inserts on a text file in order to mark line breaks.
While in vim the extra ^M are easily noticed:
#ifndef ..._BASICS_HXX^M
#define ..._BASICS_HXX^M
^M
namespace ...^M
{^M
^M
//^M
//^M
//^M
using byte = unsigned char;^M
^M
//^M
//^M
//^M
using capacity_type = unsigned long long int;^M
^M
} // namespace ...^M
^M
#endif // ..._BASICS_HXX^M
^M
~
...
~
"basics.hxx" 20 lines, 224 characters
While still in vim simply issue the following command:
:%s/\r//g
Which means to globally (g) substitute all (%s) the \r for nothing, in other words, to remove all the \r. Just save the file and you're done. Naturally you'll find a dozen other ways to accomplish the same thing and even more efficiently by means of a myriad of alternative shell external commands. So, suit yourself :-)
